In August, Des Plaines typically sees daytime highs of 27.2°C and overnight lows around 16.6°C. Compared to the annual average high of 14.3°C, August runs +13.0°C.
August in Des Plaines averages a daytime high of 27.2°C and an overnight low of 16.6°C.
August runs +13.0°C compared to Des Plaines's annual average high of 14.3°C, ranking #2 of 12 months by warmth.
Plan for daytime highs near 27.2°C and cooler evenings around 16.6°C.